Specifications

Propagation Delay Example
8-2 Propagation Delay
Propagation Delay Example
To clarify the methods used to calculate the propagation delay of a given
network, refer to Figure 8-1 and complete the following steps to calculate
the propagation delay of the network shown.
Figure 8-1. Propagation Delay Example
1. Carefully examine Figure 8-1 and identify the longest signal path
between any two end devices. Remember, the longest path is not
necessarily the longest physical path, but the path with the longest
signal delay.
You should have determined that the longest path is the path between
Workstation B and Workstation D.
2. Using the equipment delay table, Table 8-1, make a list of the
equipment the signal must pass through in this path and the
appropriate delay time for each piece of equipment.
ST-500 with Lanview
ST-500 with Lanview
File Server
ST-500 with Lanview
ST-500 with Lanview
ST-500 with Lanview
File Server
ST-500 with Lanview
ST-500 with Lanview
ST-500 with Lanview
ST-500 with Lanview
ST-500 with Lanview
ST-500 with Lanview
40 m
AUI
5 m
AUI
Fiber Optic
Repeater
500 m 10BASE5
5 m
AUI
10BASE-T
Concentrator
100 m
Twisted
Pair
1000 m
Fiber Optic
Fiber
Transceiver
5 m
AUI
Local
Repeater
5 m
AUI
30 m AUI
185 m 10BASE2
45 m
AUI
5 m AUI
500 m 10BASE5
50 m
AUI
Local
Repeater
50 m
AUI
500 m 10BASE5
5 m
AUI
1 m
AUI
24 m
AUI
50 m
AUI
Multi-port
Transceivers
5 m
AUI
10BASE-T
Transceiver
A
D
C
B
1913-30
The equipment delay times in Table 8-1 are Cabletron Systems specific
delay times. Other manufacturer’s equipment may have different delays.
Refer to the specific manufacturer’s delay times of the equipment in your
network design to calculate your propagation delay.
NOTE